(a) Spermatogenesis or the formation of sperms in human beings occurs by the process of meiosis. It results in the formation of four equal-sized daughter cells.
(b) Oogenesis or the formation of ovum in human beings occurs by the process of meiosis. It results in the formation of four daughter cells which are unequal in size i.e. are big mature ovum and 3 smell polar bodies.
Which of the following is not correct?
(a) Robert Brown discovered the cell.
(b) Schleiden and Schwann formulated the cell theory.
(c) Virchow explained that cells are formed from pre-existing cells.
(d) A unicellular organism carries out its life activities within a single cell.
Describe the digestive role of chymotrypsin. What two other digestive enzymes of the same category are secreted by its source gland?
Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their functions. Comment.
There are only two polar body formed during a oogenesis process.and they degenerate due to insufficient of cytoplasm.